disable image copy in iOS for fixed layout ePub iBooks

Hello,

Is there XHTML code to disable image copy in a fixed layout ePub file made for iBooks? I have an ePub in iBooks that I created myself manually, but when a user clicks on an image, using an iPad for example, a "copy" option comes up and is distracting. I would like to disable this so that when a user touches an image the "copy" option does not come up. But I would still like the user to be able to pinch and zoom on the image.

Thanks!

Eric